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Valeo Coolant Temperature Sensor - 700103

Valeo Coolant Temperature Sensor - 700103

This coolant temperature sensor is manufactured by Valeo to meet high performance standards. It we...

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eBayVALEO-OE 700103-OE Sensor, coolant temperature for VOLVO
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Product Information

Full details

The Valeo 700103 Coolant Temperature Sensor is designed for automotive technicians and DIY enthusiasts who require a reliable, high-precision replacement part for their vehicle's cooling system. This sensor serves as a critical component in ensuring accurate engine temperature monitoring, which is essential for optimal fuel efficiency and engine protection. While the sensor is built to OEM standards, users should verify compatibility with their specific vehicle make and model before installation, as incorrect fitment can lead to inaccurate temperature readings and potential engine performance issues.

All features

Model Part Number700103
BrandValeo

Extended Product Information

FAQs

What is the primary function of the Valeo 700103 sensor?

It monitors the temperature of the engine coolant and relays this information to the ECU for fuel management and to the dashboard for the driver's temperature gauge.

Does this sensor come with a new O-ring or gasket?

Always check your specific packaging for the included components, though it is standard practice to ensure a clean seal when installing.

Is professional installation required?

While it can be done by a DIY enthusiast with basic tools, it involves handling engine coolant and should be done with care to avoid air locks in the system.

How do I know if my coolant temperature sensor is failing?

Common signs include the engine fan not turning on, the temperature gauge staying at zero or jumping unexpectedly, or a check engine light related to cooling performance.

Can I reuse the old O-ring when installing the new sensor?

It is strongly recommended to replace the O-ring or seal whenever a sensor is removed to prevent leaks.

Troubleshooting

Dashboard temperature gauge is erratic

Check the electrical connector for corrosion and ensure it is firmly seated on the sensor.

Engine overheating warning light

Verify the cooling system has been properly bled of air and that there are no leaks around the sensor gasket.

Poor fuel economy or black smoke

Use a diagnostic scanner to check for 'Coolant Temperature Sensor' fault codes, indicating the sensor may be sending incorrect data to the ECU.

Pros and Cons

Pros

  • High-precision temperature sensing
  • Manufactured to strict Valeo quality standards
  • Lightweight and compact design
  • Direct fitment for specified vehicle applications
  • Essential for fuel economy and engine longevity

Cons

  • Requires proper cooling system knowledge for installation
  • Compatibility is limited to specific vehicle models
  • Must be handled carefully to avoid damaging the sensor tip

Setup, Compatibility & Care

  1. Compatibility Check: Always consult your vehicle's service manual or a digital parts lookup tool using your VIN to ensure the 700103 part number matches your engine type.
  2. Engine Preparation: Ensure the engine is completely cool before attempting to access the cooling system to prevent burns from pressurized coolant.
  3. Installation: Locate the existing sensor housing, disconnect the electrical connector, unscrew the old sensor using a deep socket, and quickly thread in the new Valeo sensor to minimize coolant loss.
  4. Bleeding the System: After installation, top off your coolant and bleed the cooling system to remove trapped air bubbles, which can cause erratic temperature readings.
  5. Maintenance: Periodically check the electrical connector for corrosion or loose pins to maintain a strong signal connection.

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